WO2021036399A1 - 一种基于砂岩覆盖的高温高盐沙漠快速固沙方法 - Google Patents

一种基于砂岩覆盖的高温高盐沙漠快速固沙方法 Download PDF

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WO2021036399A1
WO2021036399A1 PCT/CN2020/094873 CN2020094873W WO2021036399A1 WO 2021036399 A1 WO2021036399 A1 WO 2021036399A1 CN 2020094873 W CN2020094873 W CN 2020094873W WO 2021036399 A1 WO2021036399 A1 WO 2021036399A1
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sandstone
desert
salt
temperature
covering
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PCT/CN2020/094873
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English (en)
French (fr)
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陈传琪
张锋凌
李煜然
薛原
孟维凯
张凤举
顾冬
邹丽文
黄诗云
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中建三局第二建设工程有限责任公司
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Publication of WO2021036399A1 publication Critical patent/WO2021036399A1/zh

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    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
    • E02D3/02—Improving by compacting
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
    • Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
    • Y02A40/22—Improving land use; Improving water use or availability; Controlling erosion

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  • the invention relates to the field of desert control, in particular to a method for fast sand fixation in high-temperature and high-salt deserts based on sandstone covering.
  • the present invention provides a method for rapid sand fixation in high-temperature and high-salt deserts based on sandstone covering.
  • Sandstone excavation, sandstone covering and compaction and setting of seepage ditches are carried out in the desert area to be controlled, thereby effectively forming high temperature resistance.
  • the hardened sand surface with high wind erosion resistance and excellent water resistance reduces the cost of sand fixation in the project and greatly improves the efficiency of sand fixation in the desert.
  • a method for rapid sand fixation in high-temperature and high-salt deserts based on sandstone covering including the following construction steps:
  • Step 1 Carry out geological exploration in the desert area to be controlled, and clarify the sandstone excavation area;
  • Step 2 Cleaning of floating sand on the surface of the sandstone excavation area and excavation of the bottom sandstone;
  • Step 3 Sprinkle salt water and stir the excavated sandstone
  • Step 4 Cover the sandstone after mixing evenly on the desert surface to form a sandstone cover layer
  • Step 5 Compact the sandstone overburden
  • Step 6 Set up water seepage trenches on the compacted sandstone overburden.
  • the sandstone excavation area is located in the desert area to be controlled, the CBR value of the sandstone is 30%-50% when the maximum dry density is 95%, and the salt content of the sandstone is 0.2%-0.8%.
  • the thickness of the sandstone covering layer with water seepage grooves is 5cm, and the compaction degree is to 90%-95% of the maximum dry density to facilitate the natural infiltration of rainwater; the remaining sandstone covering layer has a maximum compaction degree of 95% to 98%
  • the dry density, the thickness of the sandstone covering layer is 15cm-30cm.
  • the invention is based on the sandstone-covered high-temperature and high-salt desert rapid sand fixation method, which has simple operation, short sand fixation period and low cost, can overcome the limitations of poor high temperature resistance, low wind resistance, and weak water resistance of traditional desert control, and improves desert control efficiency.
  • Fig. 1 is a schematic diagram of a cross section of sandstone excavation according to the present invention.
  • Fig. 2 is a schematic diagram of the completed surface of sand fixation of the present invention.
  • a method for rapid sand fixation in high-temperature and high-salt deserts based on sandstone coverage includes surveying and excavating the undisturbed sandstone 1 in the desert area to be treated, leveling the desert area to be treated, and then covering it with salt water and stirring After the uniformed sandstone is compacted, a drainage trench 4 is set on the sandstone covering layer after the sand fixation is completed; the specific steps are as follows:
  • Step 1 Carry out geological exploration in the desert area to be controlled, clarify the sandstone excavation area, and carry out the excavation of the undisturbed sandstone;
  • Step 2 Use a bulldozer to level the undulating sand dune area, so that the desert area to be controlled can meet the levelness requirements;
  • Step 3 Stack and pave the excavated sandstone to form a water storage tank, sprinkle salt water and stir evenly with a forklift.
  • the salt water is sea water or underground salt water, the salinity is greater than 35 ⁇ , and the main salt components are potassium, sodium, calcium, and magnesium. Of chloride.
  • the CBR value of sandstone is 30% when it is compacted to 95% of the maximum dry density, and the salt content of sandstone is 0.3%.
  • Step 4 Use a dump truck to transport the sandstone evenly sprinkled with salt water to the leveled desert area, and use a forklift to fill the sandstone evenly mixed with salt water;
  • Step 5 Use a road roller to compact the sandstone fill layer evenly sprinkled with salt water to form a sandstone overburden; set a water seepage trench 4 on the sandstone overburden.
  • the thickness of the sandstone cover with the water seepage trench is 5cm, and the degree of compaction is The maximum dry density of 91% is to facilitate the natural infiltration of rainwater; the compactness of the remaining sandstone cover is 96% of the maximum dry density, and the thickness of the sandstone cover is 16 cm.

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Structural Engineering (AREA)
  • Agronomy & Crop Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Soil Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)

Abstract

本发明公开了一种基于砂岩覆盖的高温高盐沙漠快速固沙方法，包括以下步骤：步骤1：对待治沙漠区域进行地质勘探，明确砂岩开挖区域；步骤2：砂岩开挖区表层浮沙清理及底部砂岩开挖；步骤3：将开挖的砂岩进行洒盐水搅拌；步骤4：将搅拌完成后的砂岩均匀覆盖于沙漠面层，形成砂岩覆盖层；步骤5：对砂岩覆盖层进行压实；步骤6：在压实的砂岩覆盖层上设置渗水沟槽，对高温沙漠区域进行治理。本发明的沙漠快速固沙方法操作简单，固沙周期短、成本低，能克服传统沙漠治理耐高温差、抵风性低、抗水性弱的局限，提高了沙漠治理效率。

Description

一种基于砂岩覆盖的高温高盐沙漠快速固沙方法 技术领域
本发明涉及沙漠治理领域，特别是一种基于砂岩覆盖的高温高盐沙漠快速固沙方法。
背景技术
我国是世界上受荒漠化影响最为严重的国家之一，其中我国的荒漠化土地以大风造成的风蚀荒漠化面积最大，土地沙漠化不仅是一个重大的生态环境问题，也是我国所面临的一个非常严峻的社会经济可持续发展问题。
目前对于沙漠治理主要存在以下不足之处：(1)植物固沙周期长，治沙效率低；(2)现有固沙方法固沙成本高，对于沙漠高温耐性较差，对于沙漠风蚀抗性较低，(3)现有化学固沙方法易受雨水侵蚀，固沙保持时间短。
发明内容
为解决以上技术问题，本发明提供了一种基于砂岩覆盖的高温高盐沙漠快速固沙方法，通过在待治沙漠区域进行砂岩开挖、砂岩覆盖压实和设置渗水沟，进而有效形成耐高温强、抵风蚀高、抗水性优的板结固沙面，降低了工程固沙成本，大大的提高了沙漠固沙效率。
本发明的技术方案如下：
一种基于砂岩覆盖的高温高盐沙漠快速固沙方法，包括以下施工步骤：
步骤1：对待治沙漠区域进行地质勘探，明确砂岩开挖区域；
步骤2：砂岩开挖区表层浮沙清理及底部砂岩开挖；
步骤3：将开挖的砂岩进行洒盐水搅拌；
步骤4：将搅拌完成后的砂岩均匀覆盖于沙漠面层，形成砂岩覆盖层；
步骤5：对砂岩覆盖层进行压实；
步骤6：在压实的砂岩覆盖层上设置渗水沟槽。
所述的砂岩开挖区域位于待治沙漠区域，砂岩在压实至95％最大干密度下的CBR值为30％～50％，砂岩的盐含量为0.2％～0.8％。
设有渗水沟槽的砂岩覆盖层厚度为5cm，压实度至90％～95％的最大干密度，以便于雨水自然下渗；其余的砂岩覆盖层压实度至95％～98％的最大干密度，所述砂岩覆盖层厚度为15cm～30cm。
本发明基于砂岩覆盖的高温高盐沙漠快速固沙方法操作简单，固沙周期短、成本低，能克服传统沙漠治理耐高温差、抵风性低、抗水性弱的局限，提高了沙漠治理效率。
附图说明
图1为本发明的砂岩开挖横断面示意图。
图2为本发明固沙完成面示意图。
附图标记说明如下：1-原状砂岩、2-沙层、3-砂岩覆盖层、4-渗水沟槽。
具体实施方法
参见附图，一种基于砂岩覆盖的高温高盐沙漠快速固沙方法，包括在待治沙漠区域进行原状砂岩1的分布勘测及开挖，对所述待治沙漠区域进行平整，之后覆盖洒盐水搅拌均匀后的砂岩并进行压实，在固沙完成的砂岩覆盖层上设置排水沟槽4；具体步骤如下：
步骤1：对待治沙漠区域进行地质勘探，明确砂岩开挖区域，并进行原状砂岩的开挖；
步骤2：使用推土机对沙丘起伏区域进行平整，使待治沙漠区域达到平整度要求；
步骤3：将开挖的砂岩堆放摊铺形成蓄水槽，洒盐水并使用铲车搅拌均匀，所述盐水为海水或地下盐水，盐度大于35‰，主要盐成分为钾、钠、钙、镁的氯化物。其中砂岩在压实至95％最大干密度下的CBR值为30％，砂岩的盐含量为0.3％。
步骤4：使用自卸车将洒盐水搅拌均匀的砂岩运输至平整后的带治沙漠区域，并使用铲车将洒盐水搅拌均匀的砂岩填铺均匀；
步骤5：使用压路机对洒盐水搅拌均匀的砂岩填铺层进行压实形成砂岩覆盖层；在砂岩覆盖层上设置渗水沟槽4，设有渗水沟槽的砂岩覆盖厚度为5cm，压实度为91％的最大干密度，以便于雨水自然下渗；其余的砂岩覆盖层压实度为96％的最大干密度，所述砂岩覆盖层厚度为16cm。

Claims (3)

  1. 一种基于砂岩覆盖的高温高盐沙漠快速固沙方法，其特征在于，包括以下步骤：
    步骤1：对待治沙漠区域进行地质勘探，明确砂岩开挖区域；
    步骤2：砂岩开挖区表层浮沙清理及底部砂岩开挖；
    步骤3：将开挖的砂岩进行洒盐水搅拌；
    步骤4：将搅拌完成后的砂岩均匀覆盖于沙漠面层，形成砂岩覆盖层；
    步骤5：对砂岩覆盖层进行压实；
    步骤6：在压实的砂岩覆盖层上设置渗水沟槽。
  2. 根据权利要求1所述一种基于砂岩覆盖的高温高盐沙漠快速固沙方法，其特征在于：所述的砂岩开挖区域位于待治沙漠区域，砂岩在压实至95％最大干密度下的CBR值为30％～50％，砂岩的盐含量为0.2％～0.8％。
  3. 根据权利要求1所述一种基于砂岩覆盖的高温高盐沙漠快速固沙方法，其特征在于：设有渗水沟槽的砂岩覆盖层厚度为5cm，压实度至90％～95％的最大干密度；其余的砂岩覆盖层压实度至95％～98％的最大干密度，所述砂岩覆盖层厚度为15cm～30cm。
PCT/CN2020/094873 2019-08-28 2020-06-08 一种基于砂岩覆盖的高温高盐沙漠快速固沙方法 WO2021036399A1 (zh)

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CN113389192A (zh) * 2021-06-23 2021-09-14 宁夏农林科学院荒漠化治理研究所（宁夏防沙治沙与水土保持重点实验室） 一种物理-化学-生物联用固沙结构及方法

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